Jada earns $7 per hour mowing her neighbors’ lawns. andre gets paid $5 per hour for the first hour of babysitting and $8 per hour for any additional hour he babysits. what is the number of hours they both can work so that they get paid the same amount?

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297